/*
 * Copyright 2007 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.starsource.forum.client.view;

import org.starsource.forum.client.domain.MessageObject;
import org.starsource.forum.client.handler.MessageUpdateHandler;
import org.starsource.forum.client.web.ForumService;
import org.starsource.forum.client.web.ForumServiceAsync;
import org.starsource.forum.client.widget.RichTextToolbar;

import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.NativeEvent;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.client.Event.NativePreviewEvent;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.RichTextArea;
import com.google.gwt.user.client.ui.Widget;

/**
 * A simple example of an 'about' dialog box.
 */
public class MessageEditDialog extends DialogBox {
	private final ForumServiceAsync forumService = GWT.create(ForumService.class);
	private MessageUpdateHandler messageUpdateHandler;
	public void setMessageUpdateHandler(MessageUpdateHandler messageUpdateHandler) {
		this.messageUpdateHandler = messageUpdateHandler;
	}

  interface Binder extends UiBinder<Widget, MessageEditDialog> { }
  private static final Binder binder = GWT.create(Binder.class);

  @UiField RichTextToolbar richTextToolbar;
  @UiField RichTextArea richTextArea;
  @UiField Button submitButton;
  @UiField Button closeButton;

  private MessageObject messageObject;

  public void setMessageObject(MessageObject messageObject) {
	  this.messageObject = messageObject;
	  richTextArea.setHTML(this.messageObject.getContent());
  }


  public MessageEditDialog() {
    // Use this opportunity to set the dialog's caption.
    setWidget(binder.createAndBindUi(this));

    setAnimationEnabled(true);
    setGlassEnabled(true);

    setText("编辑内容");
    richTextToolbar.setRichTextArea(richTextArea);
  }

  @Override
  protected void onPreviewNativeEvent(NativePreviewEvent preview) {
    super.onPreviewNativeEvent(preview);

    NativeEvent evt = preview.getNativeEvent();
    if (evt.getType().equals("keydown")) {
      // Use the popup's key preview hooks to close the dialog when either
      // enter or escape is pressed.
      switch (evt.getKeyCode()) {
        case KeyCodes.KEY_ENTER:
        case KeyCodes.KEY_ESCAPE:
          hide();
          break;
      }
    }
  }

  @UiHandler("submitButton")
  void onSubmitClicked(ClickEvent event) {
	  submitButton.setEnabled(false);
	  forumService.updateMessage(richTextArea.getHTML(), messageObject.getId(), new AsyncCallback<Void>(){

		@Override
		public void onFailure(Throwable caught) {
			// TODO Auto-generated method stub

			submitButton.setEnabled(true);
		}

		@Override
		public void onSuccess(Void result) {
			hide();
			submitButton.setEnabled(true);
			richTextArea.setText("");
			messageUpdateHandler.onMessageUpdate(messageObject);
		}

	  });
  }

  @UiHandler("closeButton")
  void onCloseClicked(ClickEvent event) {
    hide();
  }

  public void focus() {
	  richTextArea.setFocus(true);
  }
}
